The effect of major parameters of die structure on metal flow velocity is integrated and the mathematical model of design and calculation of aluminum profile extrusion die land length is derived.
并综合主要模具结构参数对金属流动速度的影响，建立了铝型材挤压模模孔工作带设计计算的数学模型。
There is an important influence of the exit velocity at the aluminum profile extrusion on invalidation of the die land.
铝型材挤出速度对模具工作带的失效有着重要影响。
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